WO2013125240A1 - Communication system - Google Patents

Communication system Download PDF

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WO2013125240A1
WO2013125240A1 PCT/JP2013/001019 JP2013001019W WO2013125240A1 WO 2013125240 A1 WO2013125240 A1 WO 2013125240A1 JP 2013001019 W JP2013001019 W JP 2013001019W WO 2013125240 A1 WO2013125240 A1 WO 2013125240A1
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base station
terminal
communication
wireless communication
output level
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PCT/JP2013/001019
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French (fr)
Japanese (ja)
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孝至 猿渡
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パナソニック株式会社
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/283—Power depending on the position of the mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H04W52/244—Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A server (4) manages the communication area of wireless communication between a base station (2) and a terminal (3). The server (4) holds information on the installation position of the base station (2), and information on the communication channel and radio field intensity to be used for wireless communication with the terminal (3). On the basis of the information on the communication channel and radio field intensity, the server (4) calculates the distance over which wireless communication between another base station (Y) and a terminal (B) within the communication area of said other base station (Y) will be subject to interference due to adjacent channel leakage when a terminal (A) within the communication area of a certain base station (X) performs wireless communication with said base station (X); on the basis of the information on the distance and the installation position, the server (4) calculates an output level at which said terminal (A), which is within the communication area of said base station (X), will not inflict interference on wireless communication between said other base station (Y) and said terminal (B) within the communication area of said other base station (Y) due to adjacent channel leakage when said terminal (A) performs wireless communication with said base station (X); and the server (4) notifies the output level to the terminal (A). Thus, it is possible to inhibit wireless communication between a base station and a terminal from being subjected to interference due to adjacent channel leakage.

Description

通信システムCommunications system
　本発明は、基地局と端末との無線通信の通信エリアを管理するサーバを備える通信システムに関し、特に、隣接チャネル漏洩を抑える技術に関する。 The present invention relates to a communication system including a server that manages a communication area for wireless communication between a base station and a terminal, and more particularly to a technique for suppressing adjacent channel leakage.
　従来、携帯電話用の無線通信システムとして、ある基地局の周辺に新たなサービス領域が形成された場合に、その基地局のサービス領域を新たなサービス領域に基づいて自律的に変更する技術が提案されている（例えば特許文献１参照）。携帯電話用の無線通信システムでは、携帯電話（端末）が基地局と無線通信するときの携帯電話（端末）の出力レベルは低い。 Conventionally, as a wireless communication system for mobile phones, when a new service area is formed around a base station, a technology has been proposed that autonomously changes the service area of the base station based on the new service area (For example, refer to Patent Document 1). In a wireless communication system for a mobile phone, the output level of the mobile phone (terminal) when the mobile phone (terminal) performs wireless communication with a base station is low.
　近年、無線通信を用いて、各家庭に設置したメーター（端末）からメータ値（電力使用量など）をはじめ、トンネルや橋脚、鉄塔、発電所などの構造物や河川、ダム、港湾、崖等の各所に各種センサを取り付け、これらの状態を示すデータを基地局で収集するシステムが提案されている。このようなデータ収集用の無線通信システムでは、メータ（端末）が基地局と無線通信するときのメータ（端末）の出力レベルが高い。 In recent years, using wireless communication, meter values (power consumption, etc.) from meters (terminals) installed in each home, tunnels, piers, steel towers, power plants, and other structures, rivers, dams, ports, cliffs, etc. A system has been proposed in which various sensors are attached to each of these locations, and data indicating these states is collected by a base station. In such a data collection wireless communication system, the output level of the meter (terminal) when the meter (terminal) wirelessly communicates with the base station is high.
　しかしながら、データ収集用の無線通信システムでは、メータ（端末）が基地局と無線通信するときのメータ（端末）の出力レベルが高いため、隣接チャネル漏洩により無線通信が干渉を受けるおそれがある、という問題があった。例えば、ある基地局Ｘの通信エリア内のメータＡ（端末Ａ）が基地局Ａと無線通信を行うときに、隣接チャネル漏洩により、他の基地局Ｙの通信エリア内のメータＢ（端末Ｂ）と基地局Ｂとの無線通信が干渉を受けるおそれがある。 However, in the wireless communication system for data collection, since the output level of the meter (terminal) when the meter (terminal) wirelessly communicates with the base station is high, the wireless communication may be interfered by adjacent channel leakage. There was a problem. For example, when meter A (terminal A) in a communication area of a base station X performs wireless communication with base station A, meter B (terminal B) in the communication area of another base station Y due to adjacent channel leakage And the base station B may be subject to interference.
　そのため、無線通信システム（特に、データ収集用の無線通信システム）において、隣接チャネル漏洩を抑えるための技術の開発が望まれていた。なお、従来の携帯電話用の無線通信システムでは、携帯電話（端末）が基地局と無線通信するときの携帯電話（端末）の出力レベルが低いため、隣接チャネル漏洩の影響については殆ど考慮されていなかった。 Therefore, it has been desired to develop a technique for suppressing adjacent channel leakage in a wireless communication system (particularly, a wireless communication system for data collection). In the conventional wireless communication system for mobile phones, since the output level of the mobile phone (terminal) when the mobile phone (terminal) communicates with the base station is low, the influence of adjacent channel leakage is almost taken into consideration. There wasn't.
国際公開第０１／０５８１９３号International Publication No. 01/058193
　本発明は、上記背景の下でなされたものである。本発明の目的は、隣接チャネル漏洩により基地局と端末との無線通信が干渉を受けるのを抑えることのできる通信システムを提供することにある。 The present invention has been made under the above background. An object of the present invention is to provide a communication system that can suppress interference between radio communication between a base station and a terminal due to adjacent channel leakage.
　本発明の一の態様は、基地局と、基地局と無線通信を行う端末と、基地局と端末との無線通信の通信エリアを管理するサーバと、を備えた通信システムであり、サーバは、管理対象の複数の基地局の各々について、基地局の設置位置の情報と、端末との無線通信に用いる通信チャネルおよび電波強度の情報と、を保持する情報保持部と、通信チャネルと電波強度の情報に基づいて、複数の基地局のうちの一つの基地局について、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信が干渉を受ける距離を算出する距離算出部と、距離と設置位置の情報に基づいて、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信に干渉を与えない出力レベルを算出する出力レベル算出部と、出力レベルを当該基地局へ通知する基地局通知部と、を備え、当該基地局は、サーバから通知された出力レベルを、当該基地局の通信エリア内の端末へ通知する端末通知部を備え、端末は、当該基地局から通知された出力レベルに基づいて、当該基地局との無線通信に用いる出力レベルを調整する出力レベル調整部を備えている。 One aspect of the present invention is a communication system including a base station, a terminal that performs wireless communication with the base station, and a server that manages a communication area of wireless communication between the base station and the terminal. For each of a plurality of base stations to be managed, an information holding unit that holds information on the installation position of the base station, information on a communication channel and radio wave intensity used for wireless communication with the terminal, a communication channel and radio wave intensity Based on the information, for one base station among a plurality of base stations, when a terminal in the communication area of the base station performs radio communication with the base station, the adjacent channel leaks in the communication area of the other base station. A distance calculation unit that calculates a distance at which the wireless communication between the terminal and another base station receives interference, and a terminal in the communication area of the base station wirelessly communicates with the base station based on the distance and installation location information. Next to when An output level calculation unit that calculates an output level that does not interfere with wireless communication between a terminal in the communication area of another base station and another base station due to channel leakage, and a base station notification that notifies the base station of the output level The base station includes a terminal notification unit that notifies the terminal in the communication area of the base station of the output level notified from the server, and the terminal outputs the output level notified from the base station. And an output level adjustment unit for adjusting an output level used for wireless communication with the base station.
　以下に説明するように、本発明には他の態様が存在する。したがって、この発明の開示は、本発明の一部の態様の提供を意図しており、ここで記述され請求される発明の範囲を制限することは意図していない。 As described below, there are other aspects of the present invention. Accordingly, this disclosure is intended to provide some aspects of the invention and is not intended to limit the scope of the invention described and claimed herein.
図１は、本発明の実施の形態における通信システムの構成を示す説明図FIG. 1 is an explanatory diagram showing a configuration of a communication system according to an embodiment of the present invention. 図２は、本発明の実施の形態における通信システム（サーバ、基地局、端末）の構成を示すブロック図FIG. 2 is a block diagram showing the configuration of the communication system (server, base station, terminal) in the embodiment of the present invention. 図３は、本発明の実施の形態における通信システムの動作（出力レベルの調整）の説明図FIG. 3 is an explanatory diagram of the operation (output level adjustment) of the communication system in the embodiment of the present invention. 図４は、本発明の実施の形態における通信システムの動作（マルチホップ通信）の説明図FIG. 4 is an explanatory diagram of the operation (multi-hop communication) of the communication system in the embodiment of the present invention. 図５は、本発明の実施の形態における通信システムの動作説明のためのシーケンス図FIG. 5 is a sequence diagram for explaining the operation of the communication system in the embodiment of the present invention. 図６は、無線センサーネットワークを使用した各種モニタリングシステムの例を示す図FIG. 6 is a diagram showing examples of various monitoring systems using a wireless sensor network.
　以下に本発明の詳細な説明を述べる。ただし、以下の詳細な説明と添付の図面は発明を限定するものではない。 The detailed description of the present invention will be described below. However, the following detailed description and the accompanying drawings do not limit the invention.
　本発明の通信システムは、基地局と、基地局と無線通信を行う端末と、基地局と端末との無線通信の通信エリアを管理するサーバと、を備えた通信システムにおいて、サーバは、管理対象の複数の基地局の各々について、基地局の設置位置の情報と、端末との無線通信に用いる通信チャネルおよび電波強度の情報と、を保持する情報保持部と、通信チャネルと電波強度の情報に基づいて、複数の基地局のうちの一つの基地局について、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信が干渉を受ける距離を算出する距離算出部と、距離と設置位置の情報に基づいて、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信に干渉を与えない出力レベルを算出する出力レベル算出部と、出力レベルを当該基地局へ通知する基地局通知部と、を備え、当該基地局は、サーバから通知された出力レベルを、当該基地局の通信エリア内の端末へ通知する端末通知部を備え、端末は、当該基地局から通知された出力レベルに基づいて、当該基地局との無線通信に用いる出力レベルを調整する出力レベル調整部を備えた構成を有している。 The communication system of the present invention is a communication system including a base station, a terminal that performs wireless communication with the base station, and a server that manages a communication area of wireless communication between the base station and the terminal. For each of the plurality of base stations, an information holding unit for holding information on the installation position of the base station, information on the communication channel and radio wave intensity used for wireless communication with the terminal, and information on the communication channel and radio wave intensity Based on one base station of a plurality of base stations, when a terminal in the communication area of the base station performs radio communication with the base station, a terminal in the communication area of another base station due to adjacent channel leakage And a distance calculation unit that calculates the distance at which the wireless communication between the base station and the other base station is subject to interference, and terminals in the communication area of the base station perform wireless communication with the base station based on the distance and installation location information When An output level calculation unit that calculates an output level that does not interfere with wireless communication between a terminal in another base station communication area and another base station due to adjacent channel leakage, and a base that notifies the base station of the output level A station notification unit, and the base station includes a terminal notification unit that notifies a terminal in the communication area of the base station of the output level notified from the server. The terminal is notified from the base station. Based on the output level, it has a configuration including an output level adjustment unit that adjusts the output level used for wireless communication with the base station.
　この構成により、基地局と端末との無線通信の通信エリアがサーバで管理される。サーバでは、複数の基地局のうちの一つの基地局について、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信が干渉を受ける距離が算出される。そして、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信に干渉を与えない出力レベルが算出され、この出力レベルが当該基地局を介して、当該基地局の通信エリア内の端末へ通知される。端末では、当該基地局から通知された出力レベルに基づいて、当該基地局との無線通信に用いる出力レベルが調整される。これにより、隣接チャネル漏洩により基地局と端末との無線通信が干渉を受けるのを抑えることができる。 With this configuration, the communication area for wireless communication between the base station and the terminal is managed by the server. In the server, for one base station of a plurality of base stations, when a terminal in the communication area of the base station performs radio communication with the base station, a terminal in the communication area of another base station due to adjacent channel leakage And the distance at which the wireless communication with other base stations is interfered. And, when a terminal in the communication area of the base station performs wireless communication with the base station, it does not interfere with wireless communication between the terminal in the communication area of another base station and the other base station due to adjacent channel leakage. An output level is calculated, and this output level is notified to terminals in the communication area of the base station via the base station. The terminal adjusts the output level used for wireless communication with the base station based on the output level notified from the base station. Thereby, it is possible to suppress the radio communication between the base station and the terminal from receiving interference due to adjacent channel leakage.
　また、本発明の通信システムでは、端末は、出力レベルの調整を行った結果、当該基地局と無線通信を直接行うことができなくなるか否かを判断する判断部と、当該基地局と無線通信を直接行うことができなくなると判断された場合に、当該基地局の通信エリア内の他の端末を介して当該基地局との無線通信を行う通信部と、を備えた構成を有してよい。 In the communication system of the present invention, the terminal determines whether or not the wireless communication with the base station cannot be performed directly as a result of adjusting the output level, and the wireless communication with the base station. And a communication unit that performs wireless communication with the base station via another terminal in the communication area of the base station when it is determined that it is impossible to directly perform the communication. .
　この構成により、端末で、出力レベルの調整を行った結果、当該基地局と無線通信を直接行うことができなくなると判断された場合には、当該基地局の通信エリア内の他の端末を介して当該基地局との無線通信（マルチホップ通信）が行われる。これにより、隣接チャネル漏洩により基地局と端末との無線通信が干渉を受けるのを抑えるときに、基地局と端末との無線通信を維持することができる。 With this configuration, if it is determined that wireless communication with the base station cannot be performed directly as a result of adjusting the output level at the terminal, the communication is performed via another terminal in the communication area of the base station. Wireless communication (multi-hop communication) with the base station. Thereby, when it suppresses that radio communication with a base station and a terminal receives interference by adjacent channel leak, the radio communication with a base station and a terminal can be maintained.
　また、本発明の通信システムでは、端末は、複数の基地局の各々について、基地局からの電波受信強度の情報と、基地局と無線通信可能な他の端末の情報と、を記憶する記憶部と、出力レベルの調整を行った結果、複数の基地局のいずれとも無線通信を直接行うことができなくなると判断された場合に、複数の基地局のうち最も電波受信強度の高い基地局と無線通信可能な他の端末を介して無線通信を行う通信制御部と、を備えた構成を有してよい。 Further, in the communication system of the present invention, the terminal stores, for each of the plurality of base stations, information on the radio wave reception intensity from the base station and information on other terminals that can wirelessly communicate with the base station. As a result of adjusting the output level, it is determined that wireless communication with any of the plurality of base stations cannot be performed directly. And a communication control unit that performs wireless communication via another terminal capable of communication.
　この構成により、端末で、出力レベルの調整を行った結果、いずれの基地局とも無線通信を直接行うことができなくなると判断された場合には、複数の基地局のうち最も電波受信強度の高い基地局と無線通信可能な他の端末を介して基地局との無線通信（マルチホップ通信）が行われる。これにより、より少ないホップ数で、あるいは、より強い電波強度で、基地局との無線通信が可能になる。 As a result of adjusting the output level at the terminal, if it is determined that wireless communication cannot be performed directly with any of the base stations, the radio wave reception intensity is the highest among the plurality of base stations. Wireless communication (multi-hop communication) with the base station is performed via another terminal capable of wireless communication with the base station. This enables wireless communication with the base station with a smaller number of hops or a stronger radio wave intensity.
　本発明のサーバは、基地局と端末との無線通信の通信エリアを管理するサーバであって、管理対象の複数の基地局の各々について、基地局の設置位置の情報と、端末との無線通信に用いる通信チャネルおよび電波強度の情報と、を保持する情報保持部と、通信チャネルと電波強度の情報に基づいて、複数の基地局のうちの一つの基地局について、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信が干渉を受ける距離を算出する距離算出部と、距離と設置位置の情報に基づいて、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信に干渉を与えない出力レベルを算出する出力レベル算出部と、出力レベルを当該基地局へ通知する基地局通知部と、を備えた構成を有している。 The server of the present invention is a server that manages a communication area for wireless communication between a base station and a terminal, and information on the installation position of the base station and wireless communication with the terminal for each of a plurality of base stations to be managed. An information holding unit that holds information on a communication channel and radio wave intensity used for the communication, and one base station among a plurality of base stations based on the information on the communication channel and radio wave intensity within the communication area of the base station A distance calculating unit that calculates a distance at which wireless communication between a terminal in another base station communication area and another base station is interfered by adjacent channel leakage when the terminal performs wireless communication with the base station; Based on the information on the installation position, when a terminal in the communication area of the base station performs wireless communication with the base station, the terminal in the communication area of the other base station and the other base station may leak due to adjacent channel leakage. Wireless communication An output level calculation unit for calculating an output level which does not interfere, and has a configuration including a base station notification section to notify the relevant base station the output level.
　このサーバによっても、上記と同様に、隣接チャネル漏洩により基地局と端末との無線通信が干渉を受けるのを抑えるように、基地局と端末との無線通信の通信エリアを管理することができる。 This server can also manage the communication area of the wireless communication between the base station and the terminal so as to suppress interference between the wireless communication between the base station and the terminal due to adjacent channel leakage, as described above.
　本発明の端末は、基地局と無線通信を行う端末であって、基地局と端末との無線通信の通信エリアは、サーバによって管理されており、サーバは、管理対象の複数の基地局の各々について、基地局の設置位置の情報と、端末との無線通信に用いる通信チャネルおよび電波強度の情報と、を保持する情報保持部と、通信チャネルと電波強度の情報に基づいて、複数の基地局のうちの一つの基地局について、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信が干渉を受ける距離を算出する距離算出部と、距離と設置位置の情報に基づいて、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信に干渉を与えない出力レベルを算出する出力レベル算出部と、出力レベルを、当該基地局を介して、当該基地局の通信エリア内の端末へ通知する通知部と、を備え、端末は、当該基地局から通知された出力レベルに基づいて、当該基地局との無線通信に用いる出力レベルを調整する出力レベル調整部と、出力レベルの調整を行った結果、当該基地局と無線通信を直接行うことができなくなるか否かを判断する判断部と、当該基地局と無線通信を直接行うことができなくなると判断された場合に、当該基地局の通信エリア内の他の端末を介して当該基地局との無線通信を行う通信部と、を備えた構成を有している。 A terminal according to the present invention is a terminal that performs wireless communication with a base station, and a communication area of wireless communication between the base station and the terminal is managed by a server, and the server includes a plurality of base stations to be managed. A base station location information, a communication channel used for wireless communication with a terminal and information on radio wave intensity, an information holding unit, and a plurality of base stations based on the communication channel and radio wave intensity information. For one of the base stations, when a terminal in the communication area of the base station performs radio communication with the base station, the terminal in the communication area of the other base station and the other base station may leak due to adjacent channel leakage. Based on the distance and installation position information, the distance calculation unit that calculates the distance at which the wireless communication is subject to interference, and other terminals due to adjacent channel leakage when the terminal in the communication area of the base station performs wireless communication with the base station. An output level calculation unit that calculates an output level that does not interfere with radio communication between a terminal in the communication area of the base station and another base station, and the output level is determined via the base station via the communication area of the base station. An output level adjustment unit that adjusts an output level used for wireless communication with the base station based on the output level notified from the base station, and an output As a result of the level adjustment, a determination unit that determines whether or not wireless communication with the base station cannot be performed directly, and when it is determined that wireless communication with the base station cannot be performed directly And a communication unit that performs wireless communication with the base station via other terminals in the communication area of the base station.
　この端末によっても、上記と同様に、隣接チャネル漏洩により基地局と端末との無線通信が干渉を受けるのを抑えるときに、基地局と端末との無線通信を維持することができる。 This terminal can also maintain the wireless communication between the base station and the terminal when the wireless communication between the base station and the terminal is prevented from being interfered by adjacent channel leakage as described above.
　本発明の方法は、基地局と端末との無線通信の通信エリアをサーバで管理する方法であって、管理対象の複数の基地局の各々について、基地局の設置位置の情報と、端末との無線通信に用いる通信チャネルおよび電波強度の情報と、を保持し、通信チャネルと電波強度の情報に基づいて、複数の基地局のうちの一つの基地局について、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信が干渉を受ける距離を算出し、距離と設置位置の情報に基づいて、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信に干渉を与えない出力レベルを算出し、出力レベルを、当該基地局を介して、当該基地局の通信エリア内の端末へ通知することを含み、端末では、当該基地局から通知された出力レベルに基づいて、当該基地局との無線通信に用いる出力レベルが調整される。 The method of the present invention is a method for managing a communication area of wireless communication between a base station and a terminal by using a server, and for each of a plurality of base stations to be managed, A communication channel and radio wave intensity information used for wireless communication, and a terminal in a communication area of the base station for one base station among a plurality of base stations based on the communication channel and radio wave intensity information Calculates the distance at which the wireless communication between the terminal in the communication area of the other base station and the other base station is subject to interference due to the leakage of the adjacent channel when performing wireless communication with the base station. Based on this, when a terminal in the communication area of the base station performs wireless communication with the base station, interference between wireless communication between the terminal in the communication area of the other base station and the other base station is caused by leakage of an adjacent channel. No output level Calculating the output level to the terminal in the communication area of the base station via the base station, and the terminal, based on the output level notified from the base station, The output level used for wireless communication with is adjusted.
　この方法によっても、上記と同様に、隣接チャネル漏洩により基地局と端末との無線通信が干渉を受けるのを抑えるように、基地局と端末との無線通信の通信エリアをサーバで管理することができる。 Also in this method, similarly to the above, the communication area of the wireless communication between the base station and the terminal can be managed by the server so as to suppress the interference of the wireless communication between the base station and the terminal due to adjacent channel leakage. it can.
　本発明は、隣接チャネル漏洩により基地局と端末との無線通信が干渉を受けるのを抑えることができる。 The present invention can suppress the interference of radio communication between the base station and the terminal due to adjacent channel leakage.
　以下、本発明の実施の形態の通信システムについて、図面を用いて説明する。本実施の形態では、各家庭に設置したメーター（端末）からメータ値（電力使用量など）を、基地局で収集するシステム（データ収集システム）等に用いられる通信システムの場合を例示する。 Hereinafter, a communication system according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a case of a communication system used for a system (data collection system) or the like that collects meter values (power consumption, etc.) from a meter (terminal) installed in each home at a base station will be exemplified.
　本発明の実施の形態の通信システムの構成を、図面を参照して説明する。図１は、本実施の形態の通信システムの全体の構成を示す説明図である。図１に示すように、通信システム１には、基地局２と、基地局２と無線通信を行う端末３と、基地局２と端末３との無線通信の通信エリアを管理するサーバ４が備えられている。なお、図１では、説明の便宜上、１つのサーバ４と３つの基地局２が図示されているが、サーバ４や基地局２の数はこれに限定されるものではない。また、図１の例では、１つの基地局２の通信エリア内に６つの端末３が図示されているが、端末３の数（１つの基地局２あたりの端末３の数）もこれに限定されるものではない。 The configuration of a communication system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of the communication system of the present embodiment. As shown in FIG. 1, the communication system 1 includes a base station 2, a terminal 3 that performs wireless communication with the base station 2, and a server 4 that manages a communication area for wireless communication between the base station 2 and the terminal 3. It has been. In FIG. 1, for convenience of explanation, one server 4 and three base stations 2 are shown, but the number of servers 4 and base stations 2 is not limited to this. In the example of FIG. 1, six terminals 3 are illustrated in the communication area of one base station 2, but the number of terminals 3 (the number of terminals 3 per one base station 2) is also limited to this. Is not to be done.
　図２は、本実施の形態の通信システム１の各構成を示すブロック図である。図２に示すように、サーバ４は、情報保持部５と制御部６と通信部７を備えている。情報保持部５には、サーバ４の管理対象の複数の基地局２の各々について、基地局２の設置位置（例えば緯度経度）の情報と、端末３との無線通信に用いる通信チャネル（帯域幅）と電波強度の情報が保持されている。 FIG. 2 is a block diagram showing each configuration of the communication system 1 of the present embodiment. As shown in FIG. 2, the server 4 includes an information holding unit 5, a control unit 6, and a communication unit 7. The information holding unit 5 includes, for each of a plurality of base stations 2 to be managed by the server 4, information on the installation position (for example, latitude and longitude) of the base station 2 and a communication channel (bandwidth) used for wireless communication with the terminal 3. ) And radio wave intensity information.
　制御部６は、距離算出部８と出力レベル算出部９を備えている。距離算出部８は、通信チャネルと電波強度の情報に基づいて、隣接チャネル漏洩により端末３と基地局２との無線通信が干渉を受ける距離を算出する。例えば、図３（ａ）に示すように、管理対象の二つの基地局Ｘ、Ｙのうちの一つの基地局Ｘについて、基地局Ｘの通信エリア内の端末Ａが基地局Ｘと無線通信を行うときに、隣接チャネル漏洩により他の基地局Ｙの通信エリア内の端末Ｂと他の基地局Ｙとの無線通信が干渉を受ける距離（漏洩距離）を算出する。 The control unit 6 includes a distance calculation unit 8 and an output level calculation unit 9. The distance calculation unit 8 calculates a distance at which the wireless communication between the terminal 3 and the base station 2 is interfered by adjacent channel leakage based on information on the communication channel and the radio wave intensity. For example, as shown in FIG. 3A, for one base station X of two base stations X and Y to be managed, a terminal A in the communication area of the base station X performs radio communication with the base station X. When performing, the distance (leakage distance) in which the wireless communication between the terminal B in the communication area of the other base station Y and the other base station Y is interfered by adjacent channel leakage is calculated.
　漏洩距離は、端末Ａと端末Ｂの出力（出力レベル）と帯域幅（通信チャネル）、端末Ａの隣接チャネル漏洩の許容電力、端末Ｂのキャリアセンスレベルに基づいて算出される。例えば、端末Ａの出力と帯域幅が「２５０ｍＷと２００ｋＨｚ」であり、端末Ｂの出力と帯域幅が「２０ｍＷと２００ｋＨｚ」であり、端末Ａの隣接チャネル漏洩の許容電力が「下側単位隣接チャネルに対して－１９ｄＢｍ以下」であり、端末Ｂのキャリアセンスレベルが「受信電力の総和が－７５ｄＢｍ」である場合、漏洩距離は「送信距離の１／９倍」である。 The leakage distance is calculated based on the output (output level) and bandwidth (communication channel) of terminal A and terminal B, the allowable power of adjacent channel leakage of terminal A, and the carrier sense level of terminal B. For example, the output and bandwidth of terminal A are “250 mW and 200 kHz”, the output and bandwidth of terminal B are “20 mW and 200 kHz”, and the allowable power of adjacent channel leakage of terminal A is “lower unit adjacent channel” If the carrier sense level of terminal B is “total received power is −75 dBm”, the leakage distance is “1/9 times the transmission distance”.
　なお、端末Ａの出力と帯域幅が「２０ｍＷと２００ｋＨｚ」であり、端末Ｂの出力と帯域幅が「１ｍＷと２００ｋＨｚ」であってもよい。要するに、隣接チャネル漏れが発生し、他方の端末に影響を及ぼす状態を示す。また帯域幅は、２００ｋＨｚに限るものではなく、任意に設定可能である。また、端末Ａ、Ｂの帯域幅は、同じでもよく、異なっていてもかまわない。 Note that the output and bandwidth of the terminal A may be “20 mW and 200 kHz”, and the output and bandwidth of the terminal B may be “1 mW and 200 kHz”. In short, an adjacent channel leakage occurs, which shows a state affecting the other terminal. Further, the bandwidth is not limited to 200 kHz, and can be arbitrarily set. Further, the bandwidths of the terminals A and B may be the same or different.
　出力レベル算出部９は、距離と設置位置の情報に基づいて、隣接チャネル漏洩により端末３と基地局２との無線通信が干渉を受けない出力レベルを算出する。例えば、図３（ｂ）に示すように、基地局Ｘの通信エリア内の端末Ａが基地局Ｘと無線通信を行うときに、隣接チャネル漏洩により他の基地局Ｙの通信エリア内の端末Ｂと他の基地局Ｙとの無線通信に干渉を与えない出力レベルを算出する。通信部７は、このようにして算出した出力レベルを、基地局Ｘへ通知する。 The output level calculation unit 9 calculates an output level at which wireless communication between the terminal 3 and the base station 2 is not interfered by adjacent channel leakage based on the distance and installation position information. For example, as shown in FIG. 3B, when the terminal A in the communication area of the base station X performs wireless communication with the base station X, the terminal B in the communication area of another base station Y due to adjacent channel leakage. And an output level that does not interfere with the wireless communication with the other base station Y is calculated. The communication unit 7 notifies the base station X of the output level calculated in this way.
　図２に戻って、通信システム１の各構成の説明を続ける。図２に示すように、基地局２は、通信部１０と制御部１１を備えている。通信部１０は、サーバ４から通知された出力レベルを、基地局２の通信エリア内の端末３へ通知する。制御部１１は、各種の通信制御を行う。 Referring back to FIG. 2, the description of each configuration of the communication system 1 will be continued. As shown in FIG. 2, the base station 2 includes a communication unit 10 and a control unit 11. The communication unit 10 notifies the output level notified from the server 4 to the terminal 3 in the communication area of the base station 2. The control unit 11 performs various communication controls.
　また、図２に示すように、端末３は、制御部１２と通信部１３と記憶部１４を備えている。制御部１２は、出力レベル調整部１５と判断部１６を備えている。出力レベル調整部１５は、基地局２から通知された出力レベルに基づいて、基地局２との無線通信に用いる出力レベルを調整する。判断部１６は、出力レベルの調整を行った結果、基地局２と無線通信を直接行うことができなくなるか否かを判断する。通信部１３は、基地局２と無線通信を直接行うことができなくなると判断された場合に、基地局２の通信エリア内の他の端末３を介して基地局２との無線通信を行う。 Further, as shown in FIG. 2, the terminal 3 includes a control unit 12, a communication unit 13, and a storage unit 14. The control unit 12 includes an output level adjustment unit 15 and a determination unit 16. The output level adjustment unit 15 adjusts the output level used for wireless communication with the base station 2 based on the output level notified from the base station 2. The determination unit 16 determines whether or not wireless communication with the base station 2 cannot be performed directly as a result of adjusting the output level. When it is determined that wireless communication with the base station 2 cannot be performed directly, the communication unit 13 performs wireless communication with the base station 2 via another terminal 3 in the communication area of the base station 2.
　例えば、図３（ｂ）に示すように、端末Ａは、出力レベルの調整を行った結果、基地局Ｘと無線通信を直接行うことができなくなると判断された場合、基地局Ｘの通信エリア内の他の端末Ｃを介して基地局Ｘとの無線通信を行う。 For example, as shown in FIG. 3B, when it is determined that the terminal A cannot directly perform radio communication with the base station X as a result of adjusting the output level, the communication area of the base station X Wireless communication with the base station X is performed via the other terminal C.
　また、記憶部１４には、複数の基地局２の各々について、基地局２からの電波受信強度（ＲＳＳＩ値）の情報と、基地局２と無線通信可能な他の端末３の情報とが記憶されている。制御部１２は、出力レベルの調整を行った結果、複数の基地局２のいずれとも無線通信を直接行うことができなくなると判断された場合に、複数の基地局２のうち最も電波受信強度の高い基地局２と無線通信可能な他の端末３を介して無線通信を行う。 In addition, the storage unit 14 stores, for each of the plurality of base stations 2, information on the radio wave reception intensity (RSSI value) from the base station 2 and information on other terminals 3 that can wirelessly communicate with the base station 2. Has been. As a result of adjusting the output level, the control unit 12 determines that it is impossible to directly perform wireless communication with any of the plurality of base stations 2, and among the plurality of base stations 2, the control unit 12 has the highest radio wave reception intensity. Wireless communication is performed via another terminal 3 that can wirelessly communicate with a high base station 2.
　例えば、図４（ａ）に示すように、端末Ａが出力レベルの調整を行った結果、基地局Ｘ、Ｙのいずれとも無線通信を直接行うことができなくなると判断された場合には、図４（ｂ）に示すように、基地局Ｘ、Ｙのうち電波受信強度の高い基地局Ｘと無線通信可能な他の端末Ｃを介して無線通信を行う。 For example, as shown in FIG. 4A, when it is determined that the wireless communication cannot be performed directly with either of the base stations X and Y as a result of the terminal A adjusting the output level, As shown in FIG. 4B, wireless communication is performed via another terminal C that can wirelessly communicate with the base station X having a high radio wave reception intensity among the base stations X and Y.
　以上のように構成された通信システム１について、図５のシーケンス図を参照してその動作を説明する。 The operation of the communication system 1 configured as described above will be described with reference to the sequence diagram of FIG.
　本実施の形態の通信システム１で端末３の出力レベルの調整をする場合には、まず、サーバ４で、管理対象の基地局Ｘ、Ｙについて、端末３との無線通信に用いる通信チャネルと電波強度の情報を取得する（Ｓ１）。つぎに、ある基地局Ｘについて、基地局Ｘの通信エリア内の端末Ａが基地局Ｘと無線通信を行うときに隣接チャネル漏洩により他の基地局Ｙの通信エリア内の端末Ｂとの無線通信が干渉を受ける距離を算出する（Ｓ２）。そして、その基地局Ｘの通信エリア内の端末Ａが基地局Ｘと無線通信を行うときに隣接チャネル漏洩により他の基地局Ｙの通信エリア内の端末Ｂと他の基地局Ｙとの無線通信に干渉を与えない出力レベルを算出する（Ｓ３）。 When adjusting the output level of the terminal 3 in the communication system 1 of the present embodiment, first, the server 4 uses the communication channels and radio waves used for wireless communication with the terminal 3 for the base stations X and Y to be managed. The intensity information is acquired (S1). Next, for a certain base station X, when terminal A in the communication area of base station X performs wireless communication with base station X, wireless communication with terminal B in the communication area of other base station Y due to adjacent channel leakage The distance at which interference is received is calculated (S2). Then, when the terminal A in the communication area of the base station X performs wireless communication with the base station X, wireless communication between the terminal B and the other base station Y in the communication area of the other base station Y due to adjacent channel leakage. An output level that does not cause interference is calculated (S3).
　サーバ４が、このようにして算出した出力レベルを基地局Ｘに通知すると（Ｓ４）、基地局Ｘは、その出力レベルを端末Ａに通知する（Ｓ５）。端末Ａでは、このようにして通知された出力レベルに基づいて、基地局Ｘとの無線通信に用いる出力レベルを調整する（Ｓ６）。 When the server 4 notifies the base station X of the output level calculated in this way (S4), the base station X notifies the terminal A of the output level (S5). The terminal A adjusts the output level used for wireless communication with the base station X based on the output level thus notified (S6).
　さらに、端末Ａは、出力レベルの調整を行った結果、基地局Ｘと無線通信を直接行うことができなくなるか否かの判断を行い（Ｓ７）、基地局Ｘと無線通信を直接行うことができなくなると判断された場合には、基地局Ｘ、Ｙのうち電波受信強度（ＲＳＳＩ値）の高い基地局Ｘの通信エリア内の他の端末Ｃを介して基地局Ｘとの無線通信を行うようにマルチホップ通信制御を行う（Ｓ８）。 Furthermore, the terminal A determines whether or not it becomes impossible to directly perform radio communication with the base station X as a result of adjusting the output level (S7), and can directly perform radio communication with the base station X. If it is determined that it cannot be performed, wireless communication with the base station X is performed via another terminal C in the communication area of the base station X having a high radio wave reception intensity (RSSI value) among the base stations X and Y. Thus, multi-hop communication control is performed (S8).
　このような本実施の形態の通信システム１によれば、隣接チャネル漏洩により基地局２と端末３との無線通信が干渉を受けるのを抑えることができる。 According to the communication system 1 of the present embodiment as described above, it is possible to suppress the radio communication between the base station 2 and the terminal 3 from receiving interference due to adjacent channel leakage.
　本実施の形態では、基地局２と端末３との無線通信の通信エリアがサーバ４で管理される。サーバ４では、複数の基地局２のうちの一つの基地局Ｘについて、当該基地局Ｘの通信エリア内の端末Ａが当該基地局Ｘと無線通信を行うときに隣接チャネル漏洩により他の基地局Ｙの通信エリア内の端末Ｂと他の基地局Ｙとの無線通信が干渉を受ける距離が算出される。そして、当該基地局Ｘの通信エリア内の端末Ａが当該基地局Ｘと無線通信を行うときに隣接チャネル漏洩により他の基地局Ｙの通信エリア内の端末Ｂと他の基地局Ｙとの無線通信に干渉を与えない出力レベルが算出され、この出力レベルが当該基地局Ｘを介して、当該基地局Ｘの通信エリア内の端末Ａへ通知される。端末Ａでは、当該基地局Ｘから通知された出力レベルに基づいて、当該基地局Ｘとの無線通信に用いる出力レベルが調整される。これにより、隣接チャネル漏洩により基地局Ｙと端末Ｂとの無線通信が干渉を受けるのを抑えることができる。 In the present embodiment, a communication area for wireless communication between the base station 2 and the terminal 3 is managed by the server 4. In the server 4, for one base station X of the plurality of base stations 2, when the terminal A in the communication area of the base station X performs wireless communication with the base station X, another base station is leaked due to adjacent channel leakage. The distance at which the wireless communication between the terminal B and the other base station Y in the Y communication area is subject to interference is calculated. Then, when the terminal A in the communication area of the base station X performs wireless communication with the base station X, the wireless communication between the terminal B and the other base station Y in the communication area of the other base station Y due to adjacent channel leakage. An output level that does not interfere with communication is calculated, and this output level is notified to the terminal A in the communication area of the base station X via the base station X. In the terminal A, based on the output level notified from the base station X, the output level used for wireless communication with the base station X is adjusted. Thereby, it can suppress that the wireless communication of the base station Y and the terminal B receives interference by adjacent channel leak.
　また、本実施の形態では、図３に示すように、端末Ａで、出力レベルの調整を行った結果、当該基地局Ｘと無線通信を直接行うことができなくなると判断された場合には、当該基地局Ｘの通信エリア内の他の端末Ｃを介して当該基地局Ｘとの無線通信（マルチホップ通信）が行われる。これにより、隣接チャネル漏洩により基地局Ｙと端末Ｂとの無線通信が干渉を受けるのを抑えるときに、基地局Ｘと端末Ａとの無線通信を維持することができる。 In the present embodiment, as shown in FIG. 3, when it is determined that wireless communication with the base station X cannot be performed directly as a result of adjusting the output level at the terminal A, Wireless communication (multi-hop communication) with the base station X is performed via another terminal C in the communication area of the base station X. As a result, when the wireless communication between the base station Y and the terminal B is prevented from receiving interference due to adjacent channel leakage, the wireless communication between the base station X and the terminal A can be maintained.
　また、本実施の形態では、図４に示すように、端末Ａで、出力レベルの調整を行った結果、いずれの基地局Ｘ、Ｙとも無線通信を直接行うことができなくなると判断された場合には、複数の基地局Ｘ、Ｙのうち最も電波受信強度の高い基地局Ｘと無線通信可能な他の端末Ｃを介して基地局Ｘとの無線通信（マルチホップ通信）が行われる。これにより、基地局Ｙと無線通信可能な他の端末Ｄを介して基地局Ｙとの無線通信（マルチホップ通信）を行うときに比べて、より少ないホップ数で、あるいは、より強い電波強度で、基地局２（基地局Ｘ）との無線通信が可能になる。 Further, in the present embodiment, as shown in FIG. 4, when it is determined that the wireless communication cannot be performed directly with any of the base stations X and Y as a result of adjusting the output level at the terminal A In this case, wireless communication (multi-hop communication) with the base station X is performed via another terminal C capable of performing wireless communication with the base station X having the highest radio wave reception intensity among the plurality of base stations X and Y. Thereby, compared with the case where wireless communication (multi-hop communication) with the base station Y is performed via another terminal D capable of wireless communication with the base station Y, the number of hops is less or the radio wave strength is stronger. Wireless communication with the base station 2 (base station X) becomes possible.
　以上、本発明の実施の形態を例示により説明したが、本発明の範囲はこれらに限定されるものではなく、請求項に記載された範囲内において目的に応じて変更・変形することが可能である。 The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed or modified according to the purpose within the scope of the claims. is there.
　他に本発明の実施の形態では、たとえば図６に示すような、各種センサや監視カメラ等を備えた無線通信部（本発明では端末として説明）を複数設置した無線センサーネットワークとして自営網を構築し、センサ等で得た情報をマルチホップ通信によって中継装置（本発明では基地局として説明）に送信し、中継装置から公衆網を介して管理センター等に送信して現場の状況を把握するようなモニタリングシステムを構築することが可能である。 In addition, in the embodiment of the present invention, for example, as shown in FIG. 6, a self-supporting network is constructed as a wireless sensor network in which a plurality of wireless communication units (in the present invention, described as terminals) having various sensors and monitoring cameras are installed. The information obtained by the sensor or the like is transmitted to the relay device (explained as a base station in the present invention) by multi-hop communication, and is transmitted from the relay device to the management center or the like via the public network so as to grasp the situation at the site. It is possible to construct a simple monitoring system.
　また、図６では無線センサーネットワーク（自営網）としてツリー型無線センサーネットワークやメッシュ型無線センサーネットワークを一例としているが、本願発明が適用可能な無線ネットワークであれば、ネットワーク網の構築形態は問わない。 In FIG. 6, a tree-type wireless sensor network or a mesh-type wireless sensor network is taken as an example of the wireless sensor network (self-owned network). However, as long as the wireless network to which the present invention can be applied, the network network configuration form is not limited. .
　また、モニタリングシステムの構築にあたっては必ずしも中継装置を介する必要は無く、直接管理センター等と通信してもかまわない。 Also, it is not always necessary to construct a monitoring system via a relay device, and it is possible to communicate directly with the management center.
　なお、サーバもシステムの構築形態によって、中継装置（基地局）との一体化やセンター側に設置など、基地局を制御できるように接続されていれば設置場所は問わない。 Note that the installation location of the server is not limited as long as the server is connected so as to control the base station, such as integration with a relay device (base station) or installation on the center side, depending on the system construction form.
　各種センサには、傾斜センサ、水位センサ、潮位センサ、波高センサ、荷重センサ、ひずみセンサ、変位センサ、気象センサ、放射線センサ、雨量センサ、粉塵センサ、人感センサ、煙センサ、水質センサ、大気センサ、風量センサ、風速センサ、水温センサ、気温センサ、雷センサ等が含まれる。 Various sensors include tilt sensor, water level sensor, tide level sensor, wave height sensor, load sensor, strain sensor, displacement sensor, weather sensor, radiation sensor, rainfall sensor, dust sensor, human sensor, smoke sensor, water quality sensor, atmospheric sensor , Air volume sensors, wind speed sensors, water temperature sensors, air temperature sensors, lightning sensors, and the like.
　一例であるが、防災・災害対策として、河川の上流から下流への各所に雨量計、水位計、監視カメラ等を設置し、これらのセンサ情報やカメラ映像を防災センター等に送信し危機管理するような河川氾濫モニタリングシステムや、水質センサや大気センサなど設置した汚染モニタリングシステム等の構築が可能である。 As an example, as a disaster prevention / disaster countermeasure, rain gauges, water level gauges, surveillance cameras, etc. are installed at various locations from the upstream to the downstream of the river, and these sensor information and camera images are sent to the Disaster Prevention Center to manage the crisis. It is possible to construct a river flood monitoring system such as this, and a pollution monitoring system installed with water quality sensors and air sensors.
　なお、図６に示した無線通信部は各種センサの他に監視カメラを備えているが、システム構築の一例であり、必ずしも必要なものではない。 Although the wireless communication unit shown in FIG. 6 includes a monitoring camera in addition to various sensors, it is an example of system construction and is not necessarily required.
　上記で挙げたような各種センサの組み合わせにより、各ニーズに応じたモニタリングシステムの構築が可能である。 It is possible to construct a monitoring system according to each need by combining various sensors as mentioned above.
　無線通信部はＲＦＩＤでもデータロガー装置、無線通信ノード等、無線通信可能なものであれば何でもよい。もちろん、無線通信部が各種センサや監視カメラ等と一体化されていてもよい。 The wireless communication unit may be anything such as an RFID, a data logger device, a wireless communication node, or the like that can perform wireless communication. Of course, the wireless communication unit may be integrated with various sensors, a monitoring camera, and the like.
　なお、センサ、無線通信部、監視カメラ等に独立して電源を供給するために、それぞれに太陽電池の設置をしてもよい。 In addition, in order to supply power independently to a sensor, a wireless communication unit, a surveillance camera, etc., a solar cell may be installed in each.
　以上に現時点で考えられる本発明の好適な実施の形態を説明したが、本実施の形態に対して多様な変形が可能なことが理解され、そして、本発明の真実の精神と範囲内にあるそのようなすべての変形を添付の請求の範囲が含むことが意図されている。 Although the presently preferred embodiments of the present invention have been described above, it will be understood that various modifications can be made to the present embodiments and are within the true spirit and scope of the present invention. It is intended that the appended claims include all such variations.
　以上のように、本発明にかかる通信システムは、隣接チャネル漏洩により基地局と端末との無線通信が干渉を受けるのを抑えることができるという効果を有し、データ収集システム等として有用である。 As described above, the communication system according to the present invention has an effect that radio communication between a base station and a terminal can be prevented from being interfered by adjacent channel leakage, and is useful as a data collection system or the like.
　１　通信システム
　２　基地局
　３　端末
　４　サーバ
　５　情報保持部
　６　制御部
　７　通信部
　８　距離算出部
　９　出力レベル算出部
　１０　通信部
　１１　制御部
　１２　制御部
　１３　通信部
　１４　記憶部
　１５　出力レベル調整部
　１６　判断部 DESCRIPTION OF SYMBOLS 1 Communication system 2 Base station 3 Terminal 4 Server 5 Information holding part 6 Control part 7 Communication part 8 Distance calculation part 9 Output level calculation part 10 Communication part 11 Control part 12 Control part 13 Communication part 14 Storage part 15 Output level adjustment part 16 Judgment part

Claims (6)

  1. 　基地局と、前記基地局と無線通信を行う端末と、前記基地局と前記端末との無線通信の通信エリアを管理するサーバと、を備えた通信システムにおいて、
    　前記サーバは、
    　管理対象の複数の基地局の各々について、前記基地局の設置位置の情報と、前記端末との無線通信に用いる通信チャネルおよび電波強度の情報と、を保持する情報保持部と、
    　前記通信チャネルと前記電波強度の情報に基づいて、前記複数の基地局のうちの一つの基地局について、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信が干渉を受ける距離を算出する距離算出部と、
    　前記距離と前記設置位置の情報に基づいて、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信に干渉を与えない出力レベルを算出する出力レベル算出部と、
    　前記出力レベルを当該基地局へ通知する基地局通知部と、
    を備え、
    　当該基地局は、
    　前記サーバから通知された前記出力レベルを、当該基地局の通信エリア内の端末へ通知する端末通知部を備え、
    　前記端末は、
    　当該基地局から通知された前記出力レベルに基づいて、当該基地局との無線通信に用いる出力レベルを調整する出力レベル調整部を備えたことを特徴とする通信システム。     In a communication system comprising a base station, a terminal that performs wireless communication with the base station, and a server that manages a communication area of wireless communication between the base station and the terminal,
    The server
    For each of a plurality of base stations to be managed, an information holding unit that holds information on the installation position of the base station, information on a communication channel and radio wave intensity used for wireless communication with the terminal,
    Based on the information on the communication channel and the radio field intensity, for one base station of the plurality of base stations, when a terminal in the communication area of the base station performs wireless communication with the base station, adjacent channel leakage A distance calculation unit that calculates a distance at which wireless communication between a terminal in the communication area of another base station and the other base station receives interference,
    Based on the information of the distance and the installation position, when a terminal in the communication area of the base station performs wireless communication with the base station, a terminal and another base in the communication area of another base station due to adjacent channel leakage An output level calculation unit that calculates an output level that does not interfere with wireless communication with a station;
    A base station notifying unit for notifying the base station of the output level;
    With
    The base station
    A terminal notifying unit for notifying the output level notified from the server to a terminal in a communication area of the base station;
    The terminal
    A communication system, comprising: an output level adjustment unit that adjusts an output level used for wireless communication with the base station based on the output level notified from the base station.
  2. 　前記端末は、
    　前記出力レベルの調整を行った結果、当該基地局と無線通信を直接行うことができなくなるか否かを判断する判断部と、
    　当該基地局と無線通信を直接行うことができなくなると判断された場合に、当該基地局の通信エリア内の他の端末を介して当該基地局との無線通信を行う通信部と、
    を備えたことを特徴とする請求項１に記載の通信システム。     The terminal
    As a result of adjusting the output level, a determination unit that determines whether or not wireless communication with the base station cannot be performed directly;
    When it is determined that wireless communication with the base station cannot be performed directly, a communication unit that performs wireless communication with the base station via another terminal in the communication area of the base station;
    The communication system according to claim 1, further comprising:
  3. 　前記端末は、
    　複数の基地局の各々について、前記基地局からの電波受信強度の情報と、前記基地局と無線通信可能な他の端末の情報と、を記憶する記憶部と、
    　前記出力レベルの調整を行った結果、前記複数の基地局のいずれとも無線通信を直接行うことができなくなると判断された場合に、前記複数の基地局のうち最も電波受信強度の高い基地局と無線通信可能な他の端末を介して無線通信を行う通信制御部と、
    を備えたことを特徴とする請求項２に記載の通信システム。     The terminal
    For each of a plurality of base stations, a storage unit that stores information on radio wave reception intensity from the base station and information on other terminals that can wirelessly communicate with the base station;
    As a result of adjusting the output level, when it is determined that wireless communication cannot be performed directly with any of the plurality of base stations, the base station with the highest radio wave reception intensity among the plurality of base stations and A communication control unit that performs wireless communication via another terminal capable of wireless communication;
    The communication system according to claim 2, further comprising:
  4. 　基地局と端末との無線通信の通信エリアを管理するサーバであって、
    　管理対象の複数の基地局の各々について、前記基地局の設置位置の情報と、前記端末との無線通信に用いる通信チャネルおよび電波強度の情報と、を保持する情報保持部と、
    　前記通信チャネルと前記電波強度の情報に基づいて、前記複数の基地局のうちの一つの基地局について、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信が干渉を受ける距離を算出する距離算出部と、
    　前記距離と前記設置位置の情報に基づいて、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信に干渉を与えない出力レベルを算出する出力レベル算出部と、
    　前記出力レベルを当該基地局へ通知する基地局通知部と、
    を備えたことを特徴とするサーバ。     A server that manages a communication area for wireless communication between a base station and a terminal,
    For each of a plurality of base stations to be managed, an information holding unit that holds information on the installation position of the base station, information on a communication channel and radio wave intensity used for wireless communication with the terminal,
    Based on the information on the communication channel and the radio field intensity, for one base station of the plurality of base stations, when a terminal in the communication area of the base station performs wireless communication with the base station, adjacent channel leakage A distance calculation unit that calculates a distance at which wireless communication between a terminal in the communication area of another base station and the other base station receives interference,
    Based on the information of the distance and the installation position, when a terminal in the communication area of the base station performs wireless communication with the base station, a terminal and another base in the communication area of another base station due to adjacent channel leakage An output level calculation unit that calculates an output level that does not interfere with wireless communication with a station;
    A base station notifying unit for notifying the base station of the output level;
    A server characterized by comprising:
  5. 　基地局と無線通信を行う端末であって、
    　前記基地局と前記端末との無線通信の通信エリアは、サーバによって管理されており、
    　前記サーバは、
    　管理対象の複数の基地局の各々について、前記基地局の設置位置の情報と、前記端末との無線通信に用いる通信チャネルおよび電波強度の情報と、を保持する情報保持部と、
    　前記通信チャネルと前記電波強度の情報に基づいて、前記複数の基地局のうちの一つの基地局について、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信が干渉を受ける距離を算出する距離算出部と、
    　前記距離と前記設置位置の情報に基づいて、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信に干渉を与えない出力レベルを算出する出力レベル算出部と、
    　前記出力レベルを、当該基地局を介して、当該基地局の通信エリア内の端末へ通知する通知部と、
    を備え、
    　前記端末は、
    　当該基地局から通知された前記出力レベルに基づいて、当該基地局との無線通信に用いる出力レベルを調整する出力レベル調整部と、
    　前記出力レベルの調整を行った結果、当該基地局と無線通信を直接行うことができなくなるか否かを判断する判断部と、
    　当該基地局と無線通信を直接行うことができなくなると判断された場合に、当該基地局の通信エリア内の他の端末を介して当該基地局との無線通信を行う通信部と、
    を備えたことを特徴とする端末。     A terminal that performs wireless communication with a base station,
    A communication area of wireless communication between the base station and the terminal is managed by a server,
    The server
    For each of a plurality of base stations to be managed, an information holding unit that holds information on the installation position of the base station, information on a communication channel and radio wave intensity used for wireless communication with the terminal,
    Based on the information on the communication channel and the radio field intensity, for one base station of the plurality of base stations, when a terminal in the communication area of the base station performs wireless communication with the base station, adjacent channel leakage A distance calculation unit that calculates a distance at which wireless communication between a terminal in the communication area of another base station and the other base station receives interference,
    Based on the information of the distance and the installation position, when a terminal in the communication area of the base station performs wireless communication with the base station, a terminal and another base in the communication area of another base station due to adjacent channel leakage An output level calculation unit that calculates an output level that does not interfere with wireless communication with a station;
    A notification unit for notifying the output level to a terminal in the communication area of the base station via the base station;
    With
    The terminal
    Based on the output level notified from the base station, an output level adjustment unit that adjusts the output level used for wireless communication with the base station,
    As a result of adjusting the output level, a determination unit that determines whether or not wireless communication with the base station cannot be performed directly;
    When it is determined that wireless communication with the base station cannot be performed directly, a communication unit that performs wireless communication with the base station via another terminal in the communication area of the base station;
    A terminal comprising:
  6. 　基地局と端末との無線通信の通信エリアをサーバで管理する方法であって、
    　管理対象の複数の基地局の各々について、前記基地局の設置位置の情報と、前記端末との無線通信に用いる通信チャネルおよび電波強度の情報と、を保持し、
    　前記通信チャネルと前記電波強度の情報に基づいて、前記複数の基地局のうちの一つの基地局について、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信が干渉を受ける距離を算出し、
    　前記距離と前記設置位置の情報に基づいて、当該基地局の通信エリア内の端末が当該基地局と無線通信を行うときに隣接チャネル漏洩により他の基地局の通信エリア内の端末と他の基地局との無線通信に干渉を与えない出力レベルを算出し、
    　前記出力レベルを、当該基地局を介して、当該基地局の通信エリア内の端末へ通知することを含み、
    　前記端末では、当該基地局から通知された前記出力レベルに基づいて、当該基地局との無線通信に用いる出力レベルが調整されることを特徴とする方法。     A method of managing a communication area of wireless communication between a base station and a terminal by a server,
    For each of a plurality of base stations to be managed, information on the installation position of the base station, information on a communication channel and radio wave intensity used for wireless communication with the terminal, and
    Based on the information on the communication channel and the radio field intensity, for one base station of the plurality of base stations, when a terminal in the communication area of the base station performs wireless communication with the base station, adjacent channel leakage To calculate the distance at which the wireless communication between the terminal in the communication area of the other base station and the other base station is subject to interference,
    Based on the information of the distance and the installation position, when a terminal in the communication area of the base station performs wireless communication with the base station, a terminal and another base in the communication area of another base station due to adjacent channel leakage Calculate the output level that does not interfere with the radio communication with the station,
    Notifying the power level to a terminal in the communication area of the base station via the base station,
    In the terminal, the output level used for wireless communication with the base station is adjusted based on the output level notified from the base station.
PCT/JP2013/001019 2012-02-23 2013-02-22 Communication system WO2013125240A1 (en)

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CN107044389A (en) * 2017-04-26 2017-08-15 北京唐浩电力工程技术研究有限公司 A kind of wind set tower drum tilt measuring method and system
JP2019175147A (en) * 2018-03-28 2019-10-10 沖電気工業株式会社 Measurement device, measurement program, measurement relay device, measurement relay program, and measurement system

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JP2005065182A (en) * 2003-08-20 2005-03-10 Nec Infrontia Corp Radio terminal control method

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Publication number Priority date Publication date Assignee Title
JP2005065182A (en) * 2003-08-20 2005-03-10 Nec Infrontia Corp Radio terminal control method

Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN107044389A (en) * 2017-04-26 2017-08-15 北京唐浩电力工程技术研究有限公司 A kind of wind set tower drum tilt measuring method and system
JP2019175147A (en) * 2018-03-28 2019-10-10 沖電気工業株式会社 Measurement device, measurement program, measurement relay device, measurement relay program, and measurement system
JP7110661B2 (en) 2018-03-28 2022-08-02 沖電気工業株式会社 measurement system

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